Effect of Magnetic Field on Isothermal Martensitic Transformation in SUS304L Stainless Steel

Abstract

We have found that solution-treated or sensitized SUS304L stainless steel transforms
isothermally from the γ (fcc)-phase to the α' (bcc) martensite via the ε' (hcp) martensite, that is, the
amount of the α'-phase increases with increasing holding time. By applying magnetic field, the α'
martensite can be induced in the ε'-plate when the steel has a sufficiently large ε' plate formed
beforehand by isothermal holding. However, the α' martensite cannot be induced by magnetic field in
the ε'-plate formed beforehand by a deformation-induced transformation.